// Numbas version: exam_results_page_options
{"name": "Luis's copy of Differentiation: Product rule", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"tags": ["algebraic manipulation", "calculus", "Calculus", "checked2015", "derivatives", "derivatives ", "differentiate a product", "differentiate polynomials", "differentiation", "elementary differentiation", "mas1601", "MAS1601", "polynomials", "product rule", "steps", "Steps"], "statement": "<p>Differentiate the following function $f(x)$ using the product rule.</p>", "name": "Luis's copy of Differentiation: Product rule", "metadata": {"notes": "\n    \t\t<p><strong>31/07/2012:</strong></p>\n    \t\t<p>Added tags.</p>\n    \t\t<p>Added description.</p>\n    \t\t<p>Steps problem to be addressed via an issue. Now resolved.</p>\n    \t\t<p>Checked calculation.OK.</p>\n    \t\t<p>Improved prompt display.</p>\n    \t\t<p>Clicking on Show steps does not lose any marks.</p>\n    \t\t", "licence": "Creative Commons Attribution 4.0 International", "description": "<p>Differentiate $f(x) = x^m(a x+b)^n$.</p>"}, "ungrouped_variables": ["a", "s1", "b", "m", "n"], "parts": [{"prompt": "\n      <p>$\\displaystyle \\simplify[std]{f(x) = x ^ {m} * ({a} * x+{b})^{n}}$</p>\n        <p>$\\displaystyle \\frac{df}{dx}=\\;$[[0]]</p>\n        <p>Clicking on Show steps gives you more information, you will not lose any marks by doing so.</p>\n      ", "type": "gapfill", "marks": 0, "showCorrectAnswer": true, "gaps": [{"checkvariablenames": false, "showCorrectAnswer": true, "answer": "{m}x ^ {m-1} * ({a} * x+{b})^{n}+{n*a}x^{m} * ({a} * x+{b})^{n-1}", "vsetrange": [0, 1], "answersimplification": "std", "expectedvariablenames": [], "vsetrangepoints": 5, "type": "jme", "marks": 3, "checkingtype": "absdiff", "scripts": {}, "checkingaccuracy": 0.001, "showpreview": true}], "stepsPenalty": 0, "scripts": {}, "steps": [{"prompt": "<p>The product rule says that if $u$ and $v$ are functions of $x$ then<br/>\\[\\simplify[std]{Diff(u * v,x,1) = u * Diff(v,x,1) + v * Diff(u,x,1)}\\]</p>", "type": "information", "marks": 0, "scripts": {}, "showCorrectAnswer": true}]}], "variables": {"s1": {"definition": "random(1,-1)", "name": "s1", "templateType": "anything", "group": "Ungrouped variables", "description": ""}, "m": {"definition": "random(3..9)", "name": "m", "templateType": "anything", "group": "Ungrouped variables", "description": ""}, "b": {"definition": "s1*random(1..9)", "name": "b", "templateType": "anything", "group": "Ungrouped variables", "description": ""}, "a": {"definition": "random(2..9)", "name": "a", "templateType": "anything", "group": "Ungrouped variables", "description": ""}, "n": {"definition": "random(3..9)", "name": "n", "templateType": "anything", "group": "Ungrouped variables", "description": ""}}, "variable_groups": [], "preamble": {"css": "", "js": ""}, "type": "question", "rulesets": {"std": ["all", "!collectNumbers", "fractionNumbers"], "surdf": [{"result": "(sqrt(b)*a)/b", "pattern": "a/sqrt(b)"}]}, "advice": "\n  \n  \n  <p>The product rule says that if $u$ and $v$ are functions of $x$ then<br/>\\[\\simplify[std]{Diff(u * v,x,1) = u * Diff(v,x,1) + v * Diff(u,x,1)}\\]</p>\n  \n  \n  \n  <p>For this example:</p>\n  \n  \n  \n  <p>\\[\\simplify[std]{u = x ^ {m}}\\Rightarrow \\simplify[std]{Diff(u,x,1) = {m}x ^ {m -1}}\\]</p>\n  \n  \n  \n  <p>\\[\\simplify[std]{v = ({a} * x+{b})^{n}} \\Rightarrow \\simplify[std]{Diff(v,x,1) = {n*a} * ({a} * x+{b})^{n-1}}\\]</p>\n  \n  \n  \n  <p>Hence on substituting into the product rule above we get:</p>\n  \n  \n  \n  <p>\\[\\simplify[std]{Diff(f,x,1) = {m}x ^ {m-1} * ({a} * x+{b})^{n}+{n*a}x^{m} * ({a} * x+{b})^{n-1}}\\]</p>\n  \n  \n  ", "showQuestionGroupNames": false, "functions": {}, "variablesTest": {"maxRuns": 100, "condition": ""}, "question_groups": [{"name": "", "pickingStrategy": "all-ordered", "questions": [], "pickQuestions": 0}], "contributors": [{"name": "Newcastle University Mathematics and Statistics", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/697/"}, {"name": "Luis Hernandez", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/2870/"}]}]}], "contributors": [{"name": "Newcastle University Mathematics and Statistics", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/697/"}, {"name": "Luis Hernandez", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/2870/"}]}